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Sofia Kovalevskaya, first woman to receive a Ph.D. in mathematics, and her unconventional journey ✍️ Sofia Kovalevskaya, born on January 15, 1850, in Moscow, Russia, emerged as a trailblazing mathematician during an era when women had limited access to higher education. Her early interest in mathematics was kindled by unconventional means; her family's home had wallpaper made from her father's old calculus notes, which she avidly studied. Despite societal constraints, Sofia's passion for mathematics drove her to seek further education. To circumvent restrictions on women attending university in Russia, she entered into a marriage of convenience with Vladimir Kovalevsky, allowing her to travel to Germany for her studies. Kovalevskaya studied under some of the most prominent mathematicians of the time, including Karl Weierstrass at the University of Berlin. She was not allowed to formally enroll due to her gender but was given private lessons by Weierstrass, who recognized her exceptional talent. In 1874, she earned her doctorate from the University of Göttingen summa cum laude, becoming the first woman to receive a Ph.D. in mathematics. Her dissertation on partial differential equations, specifically the Cauchy-Kovalevskaya theorem, remains a fundamental result in the field. Despite her qualifications, Kovalevskaya faced significant barriers in securing a position in academia. It wasn't until 1883 that she was appointed as a lecturer at Stockholm University in Sweden, and two years later, she became a full professor, making her the first woman to hold such a position in Europe. Her research during this period was prolific and varied, encompassing topics such as the dynamics of Saturn's rings, the shape of a rotating solid body, and the theory of elliptic functions. Kovalevskaya was also an advocate for women in science and played a pivotal role in promoting gender equality in academia. Her perseverance and achievements opened doors for future generations of women mathematicians. Sadly, her life was cut short when she died of influenza on February 10, 1891, at the age of 41.